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Thin monomolecular polymer layers as low-dimensional polymer systems

  • T. M. Birshtein
  • O. V. Borisov
  • A. A. Mercurieva
  • E. B. Zhulina
Conference paper
Part of the Progress in Colloid & Polymer Science book series (PROGCOLLOID, volume 85)

Abstract

The theory of phase transitions in monomolecular polymer layers is developed as in low-dimensional systems. Two types of planar layers are considered: the layers formed by the chains lying on the surface or by the chains grafted onto it at one end. In the former case the system is two-dimensional, whereas in the latter case the chains are effectively one-dimensional. It is shown that he character of conformational transitions in these low-dimensional systems differs markedly from that of transitions in ordinary three-dimensional systems. According to the mean-field theories, the LC-ordering in a two-dimensional system of anisotropic or anisotropically interacting particles loses its jumpwise character and becomes the second-order phase transition (with the exception of a system of particles oriented along the axes of the hexagonal lattice). In a quasi-one-dimensional system of chains grafted at one end onto the surface and immersed in a solvent, the transition related to the collapse of the layer caused by a decrease in the solvent strength loses the phase character for uncharged chains, but retains the character of the first-order phase transition for polyelectrolyte chains.

Key words

Monomolecular polymer layers polymer liquid crystals orientational ordering phase transitions grafted polymer layers low-dimensional systems 

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Copyright information

© Dr. Dietrich Steinkopff Verlag GmbH & Co. KG 1991

Authors and Affiliations

  • T. M. Birshtein
    • 1
  • O. V. Borisov
    • 1
  • A. A. Mercurieva
    • 1
  • E. B. Zhulina
    • 1
  1. 1.Institute of Macromolecular CompoundsAcademy of Sciences of the USSRLeningradUSSR

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